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⚡ One HLD concept. 60 seconds. Interview ready
HLD: Password Hashing and Salt Explained
Password hashing with unique salts ensures security by creating different hashes for identical passwords.
⚡ One HLD concept. 60 seconds. Interview ready
Hashing vs Encryption: Key Differences Explained
Hashing is one-way for verification, while encryption is two-way for confidentiality.
⚡ One HLD concept. 60 seconds. Interview ready
HLD: Authentication vs Authorization Explained
Authentication verifies who you are, while authorization determines what you can do.
⚡ One HLD concept. 60 seconds. Interview ready
Session-Based Authentication: How Cookies & Sessions Work
Session-based authentication uses cookies to remember users after login.
⚡ One HLD concept. 60 seconds. Interview ready
OAuth 2.0: Access Data Without Sharing Your Password
OAuth 2.0 lets apps access user data securely without passwords.
⚡ One HLD concept. 60 seconds. Interview ready
Encryption at Rest vs In Transit: Protecting Your Data
Encryption at rest and in transit are essential for protecting data both stored and in motion.
⚡ One HLD concept. 60 seconds. Interview ready
Access Tokens vs Refresh Tokens: How Token Renewal Works
Access tokens are short-lived tokens for API access, while refresh tokens renew them without re-login.
⚡ One HLD concept. 60 seconds. Interview ready
HTTP vs HTTPS: Understanding the Key Differences
HTTPS is a secure version of HTTP that encrypts data for safety.
⚡ One HLD concept. 60 seconds. Interview ready
Understanding Cache Penetration in System Design
Cache penetration occurs when requests for non-existent data overload the database.
⚡ One HLD concept. 60 seconds. Interview ready
Understanding the TLS Handshake in HTTPS Connections
The TLS handshake establishes a secure connection for HTTPS, ensuring data safety.
⚡ One HLD concept. 60 seconds. Interview ready
Understanding API Keys: Identification and Security
API keys help identify clients and control their access to APIs securely.